The main reason is other buyers who are better able to pin down operating costs will either outbid you because they have their costs right, or you'll outbid them because you have your costs wrong. 

My main concern would be the occurrence of an emergency before I had time to build up a sufficient reserve fund.

Main goal is to listen... then follow-up regularly.

Therefore, the taste of your renters is more important than yours.As to the horror stories about Tulum, they're mainly about the supposed environmental destruction.

Mainly because I'm particular about certain details in the transaction. 

Main questions should ask about the seller's:- Reasons/Motivations for wanting to sell- Desired timeline to close- Plan's after selling (relocation, reinvesting proceeds, 1031 exchange, etc)- Back-up plan in case they are unable to sell within the desired timeline- Reasons for not already selling to/with a investor or RealtorAdditional questions will depend on the type of seller lead i.e. pre-foreclosure, probate, fsbo, absentee owner, etc.Here is an example of a youtube search you can use to begin finding call recordings.There are 1,000s and you'll find that the best/most effective ones don't even sound like sales calls.

I'd mainly be lending in DFW.

The full payment would be around $5,400 : The ADU could rent for $2k per month and you would be left with $3,400 per month on the main home.

There is a good real estate professional group in the area that I think mainly communicate via Facebook.

Now mainly because of this boat, he is Not paying rent for this month and wants to leave(I'm happy that he wants to go).